Science

Q: Which of the following is not a structural isomer of 1-pentene?A) 1-methyl-cyclobuteneB) 2-methyl-2-buteneC) 3-methyl-1-buteneD) 2-penteneE) cyclopentane

Q: Name the following: A) 1,1,1-trichloro-5-bromo-3-pentene B) 1,1,1-trichloro-5-bromo-2-pentene C) 1-bromo-5,5,5-trichloro-2-pentene D) 1,1,1-trichloro-5-bromo-3-pentyne E) none of these

Q: CH3C CCH2CH2Cl is namedA) 1-chloro-3-pentyne.B) 5-chloro-2-pentyne.C) 5-chloro-2-pentene.D) 1-acetylenyl-3-chloropropane.E) 1-chloro-3-pentene.

Q: Name the following: A) 3-methyl-4-pentyne B) 3-methyl-1-pentyne C) 1-hexyne D) 2-ethyl-3-butyne E) 2-ethynyl butane

Q: Which is the correct condensed structural formula for 2-methyl-4-propyloctane?A) B) C) D) E)

Q: What is the molecular formula of the alkane 2,2,4-trimethylpentane? A) C8H14 B) C8H8 C) C8H16 D) C8H18 E) C8H24

Q: Which of the following formulas represents butane? A) CH3CH3 B) CH3CH2CH3 C) CH3CH2CH2CH2CH3 D) CH3CH2CH2CH3 E) CH4

Q: Which is the correct condensed structural formula for 3,3-diethylhexane?A) B) C) D) E)

Q: What is the condensed structural formula of the propyl group?A) B) C) D) E)

Q: What is the IUPAC name for the molecule given below? A) trans-3-hexene B) cis-3-hexene C) cis-3-pentene D) cis-3-pentyne E) trans-3-hexyne

Q: What is the IUPAC name for the following structural formula? A) 1,1-dimethyl-2-ethylpropane B) isoheptane C) 2-ethyl-3-methylbutane D) 2-methyl-3-ethylbutane E) 2,3-dimethylpentane

Q: What is the IUPAC name for the following compound? A) 4-ethyl-3-methylheptane B) 2,3-diethylhexane C) 3-propyl-4-methylhexane D) 4,5-diethyldecane E) 4-ethyl-5-methylheptane

Q: What is the most characteristic reaction of benzene? A) addition and elimination B) addition C) oxidation D) reduction E) substitution

Q: Which of the following reactions is a substitution reaction?A) C6H6+ F2→C6H5F + HFB) CH2=CH2+ F2→CH2FCH2FC) CH2=CH2+ HF →CH3CH2FD) CH2=CH2+ H2→CH3CH3E) HCCH + 2F2→CHF2CHF2

Q: What is the purpose of the circle in the condensed formula given below? A) The circle represents the delocalization of the pi electrons. B) The circle represents the delocalization of both the sigma and pi electrons. C) The circle represents alternating single and double bonds in the ring. D) B and C. E) A, B, and C.

Q: Which of the following statements concerning aromatic hydrocarbons is/are correct? 1) Benzene requires a catalyst to undergo an addition reaction with Br2. 2) The pi electrons of benzene are delocalized over the entire carbon ring. 3) Aromaticity leads to decreased stability relative to alkenes. A) 1 only B) 2 only C) 3 only D) 1 and 2 E) 1, 2, and 3

Q: What is the compound represented by the following structure? A) cyclohexane, C6H12 B) cyclohexene, C6H10 C) cyclohexatriene, C6H12 D) benzene, C6H6 E) cyclohexatriene, C6H9

Q: The functional group of an alkyne consists ofA) 3 bonds.B) 2 bonds and 1 bond.C) 3 bonds.D) 1 bond and 2 bonds.E) 1 bond and 1 bond.

Q: What category of hydrocarbons contains a carbon"carbon triple bond? A) alkane B) aromatic C) alkyne D) alkene E) cycloalkane

Q: What is the molecular formula of a straight-chain alkyne with 7 carbon atoms? A) C7H7 B) C7H18 C) C7H16 D) C7H14 E) C7H12

Q: What is the expected major product from the reaction of 2-methyl-2-pentene with HCl?A) B) C) D) E)

Q: What is the expected product from the reaction of 2,3-dimethyl-1-pentene with hydrogen gas? A) 2,2-dimethylpentane B) 2,3-dimethylpentane C) 3,3-dimethylpentane D) 2-methylhexane E) 2,3-dimethyl-2-pentene

Q: What is the major product after addition of two HCl to propyne, CH3CCH?A) CH3CHClCH2ClB) CH2ClCH2CH2ClC) CH3CCl2CH3D) CH3CH2CCl2HE) CH3CHCl=CH2

Q: What is the major product upon addition of HF to propene? A) CH3CHFCH2F B) CH3CH2CH3 C) CH3CHFCH3 D) CH3CH2CH2F E) CH3CHF=CH2

Q: Which of the following names may represent either a cis or a trans isomer?A) 1-buteneB) 1,2-dibromoetheneC) 1,1,2-tribromoetheneD) 1,1-dibromoetheneE) 1-bromo-1-chloroethene

Q: Which of the following alkenes is capable of forming cis-trans isomers?A) (CH3)2C = CH2B) (CH3)2C= CHFC) CH3CH = CH2D) CH3CH = CF2E) CHF = CHBr

Q: How many different isomers are possible for substances having the molecular formula C2H2F2? A) 2 B) 4 C) 5 D) 3 E) 1

Q: Which of the following structural formulas is not an isomer of cis-2-pentene?A) B) C) D) E)

Q: Which of the following is a geometric isomer of the structure given below?A) B) C) D) E)

Q: The functional group of an alkene consists ofA) 3 bonds.B) 1 bond and 1 bond.C) 2 bonds and 1 bond.D) 2 bonds.E) 2 bonds.

Q: Which of the following best describes the bonding in ethylene, CH2=CH2? A) The pi electrons are localized above and below a plane defined by the carbon and hydrogen atoms. B) The pi electrons are localized between the two carbons. C) Each carbon atom is sp2hybridized. D) A and C. E) B and C.

Q: What category of hydrocarbons contains a carbon"carbon double bond? A) cycloalkane B) alkyne C) alcohol D) alkane E) alkene

Q: What is the molecular formula of a straight-chain alkene with 10 carbon atoms? A) C10 H18 B) C10 H24 C) C10 H22 D) C10 H20 E) C10 H10

Q: Which of the following chemical equations represents a substitution reaction?A) C2H4+ Cl2 → ClCH2CH2ClB) HCOOH + CH3OH → HCOOCH3+ H2OC) CH3OH + 3/2O2 → CO2+ 2H2OD) C2H4+ 3O2 → 2CO2+ 2H2OE) C2H6+ Cl2 → CH3CH2Cl + HCl

Q: Which of the following is a possible product of the chlorination of butane in the presence of light? A) C4H9Cl2 B) C4H6Cl2 C) C4H10Cl2 D) C4H9Cl E) C4H8Cl

Q: Equal masses of each of the following are reacted with an excess of dioxygen. Which would form the greatest amount of carbon dioxide? A) neopentane B) n-pentane C) isopentane D) Two of these would form equal amounts. E) All of these would form equal amounts.

Q: What is the composition of crude oil?A) mostly unsaturated hydrocarbons having 5-12 carbons per moleculeB) mostly hydrocarbons, but the precise composition varies widely depending on locationC) mostly aromatic hydrocarbonsD) mostly saturated hydrocarbons having 5-12 carbons per moleculeE) mostly saturated hydrocarbons having 12-20 carbons per molecule

Q: What is the molecular formula of a cyclic alkane with 6 carbon atoms? A) C6 H14 B) C6 H10 C) C6 H16 D) C6 H12 E) C6 H6

Q: How many hydrogen atoms are needed to complete the following hydrocarbon structure? A) 10 B) 12 C) 8 D) 14 E) 6

Q: Four of the following compounds are structural isomers. Which one is not?A) B) C) D) E)

Q: It is possible to write at least two different structural formulas for each of the following molecular formulas except A) C2HCl3. B) C3H7Cl. C) C3H6. D) C4H10. E) C2H2Cl2.

Q: The compounds 2,3-dimethylbutane and 2-methylpentane are A) functional isomers. B) structural isomers. C) unrelated. D) geometric isomers. E) enantiomers.

Q: Which of the following statements is true concerning the two compounds 2,3-dimethylpentane and 2,4-dimethylpentane? A) Because the two compounds are structural isomers, they should have the same molecular formula. B) Because the two compounds are structural isomers, they should have identical chemical properties. C) Because the two compounds are structural isomers, they should have identical physical properties. D) Because the two compounds are enantiomers, they should rotate polarized light in opposite directions. E) Because the two compounds are geometric isomers, one should be cisand the other should be trans.

Q: How many structural isomers have the molecular formula C6H14? A) 5 B) 2 C) 4 D) 1 E) 3

Q: Based on the three condensed structural formulas below, which of the following statements is true?1 23 A) Formulas 2 and 3 describe enantiomers.B) Formulas 1 and 3 describe different compounds.C) Formulas 1 and 2 describe structural isomers.D) Formulas 1, 2, and 3 all describe the same compound.E) Formulas 2 and 3 describe geometric isomers.

Q: All of the following molecules except _________ make up a homologous series.A) CH3C H2CH2CH2CH2CH3B) CH3CH2CH3C) CH3CH2CH2CH3D) CH3CH2CH2CH2CH3E) CH3CHCHCH3

Q: Which of the following is the general formula for an alkane? A) CnH2n+2 B) C2nH2n-2 C) CnHn D) CnH2n E) none of these

Q: Which of the following is an example of a condensed formula of an alkane?A) C3H8B) C) D) E) CH3CH2CH2CH3

Q: Which of the following molecules has the longest carbon"carbon bond distance? A) C6H6 B) H2CCO C) H2CCH2 D) H3CCH3 E) HCCH

Q: What is the molecular geometry around each carbon atom in a saturated hydrocarbon? A) tetrahedral B) trigonal planar C) trigonal bipyramidal D) linear E) bent

Q: Which of the following statements concerning hydrocarbons is/are correct? 1) Saturated hydrocarbons may be cyclic or acyclic molecules. 2) An unsaturated hydrocarbon molecule contains at least one double bond. 3) Ethylenediamine, H2NCH2CH2NH2, is an example of a saturated hydrocarbon. A) 1 only B) 2 only C) 3 only D) 1 and 2 E) 1, 2, and 3

Q: Which of the following structures is incorrect?A) B) C) D) E)

Q: 1s22s22p63s23p64s23d2is the correct electron configuration for which of the following atoms? A) Ti B) Ca C) Ge D) Zr E) none of these

Q: Fe has __________ that is(are) unpaired in its d orbitals. A) 3 electrons B) 4 electrons C) 1 electron D) 2 electrons E) 5 electrons

Q: Ti has __________ in its d orbitals. A) 1 electron B) 2 electrons C) 3 electrons D) 4 electrons E) none of these

Q: An element with the electron configuration [Xe]6s24f145d7would belong to which class on the periodic table? A) rare-earth elements B) transition elements C) alkaline-earth elements D) halogens E) none of the above

Q: Transition metals can be distinguished from main-group metals by the fact that A) main-group metals have only +1 or +2 oxidation states. B) transition metals have higher relative atomic masses than main-group metals. C) transition metals have a greater tendency to form colored compounds than main-group metals. D) main-group metals have higher relative atomic masses than transition metals. E) only the main-group metals can form complex ions.

Q: Which of the following is not a characteristic property of transition-element compounds?A) Most of them are colored.B) Most of them are paramagnetic.C) Most of the metals exhibit multiple oxidation states.D) Most of the elements form many complexes.E) Most of the elements, upon ionizing, lose the d electrons first.

Q: Which of the following is not a characteristic of the transition metals?A) variable oxidation stateB) the ability to form many colored compoundsC) valence electrons in a d subshellD) high electronegativityE) the ability to form complex ions

Q: Which of the following is not a transition-metal?A) cobaltB) rutheniumC) rhodiumD) vanadiumE) aluminum

Q: The spectrochemical series is an arrangement ofA) ligands in order of their tendency to split the dorbitals of a transition metal ion.B) coordination compounds in order of increasing ligand field splitting ().C) complex ions in order of the wavelength of light absorbed.D) ligands in the order of electronegativity.E) ligands in order of Lewis basicity.

Q: Which of the following statements concerning crystal field theory is/are correct?1) The visible absorption maxima of transition metal coordination complexes are a measure of the crystal field splitting ().2) As the crystal field splitting () of a coordination complex increases, the wavelength of visible light absorbed decreases.3) All tetrahedral complexes are high spin.A) 1 onlyB) 2 onlyC) 3 onlyD) 1 and 2E) 1, 2, and 3

Q: Which of the following statements concerning crystal field theory is incorrect?A) In an isolated metal ion the d-orbitals have identical energies.B) In low spin octahedral complexes the electrons are concentrated in the dxy, dxz, and dyzorbitals.C) High spin complexes have the minimum of unpaired electrons.D) Strong bonding ligands favor a larger crystal field splitting () than weak bonding ligands.E) Low spin complexes are favored when the electron pairing energy (P) is less than the crystal field splitting ().

Q: Which of the following salts would be expected to be colored in aqueous solution? A) AlI3 B) CuI C) TiCl4 D) CrCl2 E) ScI3

Q: Which of the following salts would not be expected to be colored in aqueous solution?A) CrF3B) NiF2C) TiF3D) ScF3E) MnF3

Q: Which of the following salts would not be expected to be colored in aqueous solution?A) CoCl2 B) FeCl2C) CuCl2D) CuClE) CrCl3

Q: Which of the following salts would not be expected to be colored in aqueous solution?A) NiCl2B) CuCl2C) CrCl2D) TiCl3E) CdCl2

Q: How many unpaired electrons are there in the tetrahedral complex ion [FeCl4]-?A) 3B) 2C) 1D) 4E) 5

Q: The complex ion NiCl42- is tetrahedral. The number of unpaired electrons in the complex isA) 2.B) 3.C) 0.D) 4.E) 1.

Q: A complex ion is a square planar complex. It has a d8electron configuration. What is the most reasonable d orbital scheme for this complex?A) B) C) D) E)

Q: Which of the following compounds is paramagnetic? A) Li4[Fe(NO2)6] B) K3[Co(CN)6] C) K3[ScCl6] D) Na2[TiBr6] E) [Mn(H2O)6]Cl2

Q: How many unpaired electrons are there in an octahedral cobalt(III) complex with weak-bonding ligands? A) 1 B) 2 C) 4 D) 3 E) 0

Q: If an octahedral iron(II) complex is diamagnetic, which of the following sets of conditions best describes the complex?A) low spin, smallB) high spin, largeC) low spin, largeD) high spin, smallE) none of the above

Q: The octahedral complex hexacyanoferrate(III) ion, [Fe(CN)6]3-, is a low-spin complex. How many unpaired electrons does the complex have?A) 5B) 1C) 4D) 0E) 3

Q: Which combination leads to a high-spin octahedral complex? A) low pairing energy and a weak-bonding ligand B) high pairing energy and a weak-bonding ligand C) moderate pairing energy and a strong-bonding ligand D) high pairing energy and a strong-bonding ligand E) low pairing energy and a strong-bonding ligand

Q: Which of the following describes a d6metal-ion complex with ligands that bond strongly to the metal ion? A) Pairing energy is less than crystal field splitting, giving a low-spin complex. B) Pairing energy is greater than crystal field splitting, giving a low-spin complex. C) Pairing energy is less than crystal field splitting, giving a high-spin complex. D) A d6ion has only one possible electron arrangement regardless of the ligands. E) Pairing energy is greater than crystal field splitting, giving a high-spin complex.

Q: In which of the following complexes does the transition metal have a d8configuration?A) Cu(H2O)62+B) Fe(CN)63-C) Ni(CO)4D) PtCl42-E) Zn(NH3)42+

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